On Albanese torsors and the elementary obstruction
โ Scribed by Olivier Wittenberg
- Publisher
- Springer
- Year
- 2007
- Tongue
- English
- Weight
- 424 KB
- Volume
- 340
- Category
- Article
- ISSN
- 0025-5831
No coin nor oath required. For personal study only.
๐ SIMILAR VOLUMES
We consider partial liftings k : A โ E of maps f : X โ B, where (X, A) is a relative CW-complex and E โ B is a fibration. In this situation, we have a primary obstruction to extend the partial lifting to a lifting of f on all of X, and there is an obstruction to extend k as an ordinary map into the
We give an exponential upper bound in p 4 on the size of any obstruction for path-width at most p. We give a doubly exponential upper bound in k 5 on the size of any obstruction for tree-width at most k. We also give an upper bound on the size of any intertwine of two given trees T and T $. The boun